NXP Semiconductors PXN2020, Reference Manual, Page: 632 / 1376

FlexRay Communication Controller (FlexRAY)
PXN20 Microcontroller Reference Manual, Rev. 1
26-18 Freescale Semiconductor
26.5.2.7 Message Buffer Data Size Register (MBDSR)
This register defines the size of the message buffer data section for the two message buffer segments in a
number of two-byte entities.
The controller provides two independent segments for the individual message buffers. All individual
message buffers within one segment have to have the same size for the message buffer data section. This
size can be different for the two message buffer segments.
26.5.2.8 Message Buffer Segment Size and Utilization Register (MBSSUTR)
This register is used to define the last individual message buffer that belongs to the first message buffer
segment and the number of the last used individual message buffer.
Base + 0x000C Write: POC:config
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R 0
MBSEG2DS
0
MBSEG1DS
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 26-7. Message Buffer Data Size Register (MBDSR)
Table 26-13. MBDSR Field Descriptions
Field Description
MBSEG2DS Message Buffer Segment 2 Data Size — The field defines the size of the message buffer data section in
two-byte entities for message buffers within the second message buffer segment.
MBSEG1DS Message Buffer Segment 1 Data Size — The field defines the size of the message buffer data section in
two-byte entities for message buffers within the first message buffer segment.
Base + 0x000E Write: POC:config
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R 0
LAST_MB_SEG1
0
LAST_MB_UTIL
W
Reset 0 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1
Figure 26-8. Message Buffer Segment Size and Utilization Register (MBSSUTR)